Electric spot-welding machine.



P. P. MGBERTY.

ELECTRIC SPOT WELDING MACHINE.

APPLICATION FILED SEPT. so, m12.

1,098,632, 4 Patented June 2, 1914.

2 SHEETS-SHEET 1.

P.- P. MGBERTY.

ELECTRIC SPOT WELDING MACHINE. AIFLIOATION 'FILED SEPT. ab, 1912.

Patented June 2, 1914 2 SHEETS-SHEET 2.

WTNESSES NVENOR UNITED sTATEs PATENT oEEIoE.'

FREDERICK r. MQEERTY, 0E WARREN, oIIIo, AssIGNoR To THE NATIONAL ELECTRIC WELDER COMPANY, 0E WARREN,

OHIO, A CORPORATION 0F OHIO.

LECTRIC SPOT-WELDING :MACHINE.

Patented June 2, 1914.

Applicationmea september ao, 1912. serial No. 723,19a

To all whom t may concern:

Be it known that I, FREDERICK P. MC- BERTY, of Warren, in the county of Trumbull and State of Ohio, have invented certain new anduseful Improvements in Electric Spot-Veldin Machines; and I do hereby declare the fo lowing to be a full, clear," and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of this invention is to extend the range of efficiency of spot welding machines, that is to say, to enable them to handle all classes'of'work including boxes 0r vessels of greater or less depth.

In the accompanying drawing, Figure 1 is a side elevation, parts being indicated in dotted lines. Fig. 2 is a front elevation. Fig. 3 is a view in perspective with parts broken away.

Referring to the drawings, 1 designates the upper electrode, and 2 the lower electrode, the former being relatively fixed while the latter, according to one phase of my invention, is relatively adjustable longltudinally its axis. The supporting arm 3 of the lower electrode extends horizontally from the machine frame 4,- and is always parallel with the support of the'upper electrode. It is capable of being ad]usted in a vertical plane and held at any desired point.

'lhe electrode 2 is mounted on the upper end of a vertically-disposed horn or extension 5 detachably secured to arm 3. The-v Y horn may be of any desired length, depend'- ing upon the depth of the article to be welded, and hence a series of horns differing in length may be provided. TheI construction `of the means` for adjusting the hornsupporting arm may be widely varied, but it is essential that this arm, which is composed of heavy copper, always be in proper engagement with the respective electric ter-v minal of the machine. I have shown this terminal as composed of a copper plate (i.

centrally of which isa vertically-arranged rack bar 7 with which meshes a gear wheel 8 mounted in the inner end of the horn supporting arm. `The shaft of this wheel is designed to be engaged by handle 9 by lwhich it may be readily turned to raise or lower the supporting arm when binding bolt 10 is loosened. The extent to which they arm is raised or lowered depends upon the length of the horn or extension, which latter is preferably vcontrolled by the character of the work, .that is to say, the depth of the vessel.

The advanta es of'my invention will be readlly appreciw those skilled in the art.

I claim as my inventihn: l A vspot weldingjmachlne havinga relatively ixed electrode, a -horizontally disposed arm, a vertically disposed horn carried by said arm, a second electrode mounted on said horn, and means for movlng said arm in a vertical plane. Y

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

FREDERICK P.

Witnesses:

R. H. SNYDER, J. M.GILLEN.

MCBERTY. 

